1. Proximity
2. Repeated, unplanned interactions
3. A setting that encourages people to let their guard down and confide in each other
As an adult, this combo is hard to find.
I feel lucky to have made many friends at conferences. I don't see these friends often. Unfortunately, 1 doesn't apply.
A buddy recently said "I value our friendship". May sound cheesy, but it meant a lot to me. Highly recommend telling people they're appreciated. 👍